Fourths to joseph ii



(No Model.) Y

J. P. KESTER.

REGULATOR FOR DYNAMO ELECTRIC MACHINES 0R MOTORS. I

No. 404,714. Patented June 4, 1889.v

WITNESSES L I'dwvw Vault) i6 664%;

UNITED STATES PATENT OFFICES.

JESSE F. KESTER, OF TERRE IIAUTE, INDIANA, ASSIGJOR OF THREE- FOURTHS TO JOSEPH II. BRIGGS, OF SAME PLACE.

REGULATOR FOR DYNAMO-ELECTRIC MACHINES OR MOTORS.

SPECIFICATION forming part of Letters Patent N 0. 404,714, dated June 4, 1889.

Application filed October 29, 1888.

T0 aZZ whom it may concern:

Be it known that I, JESSE F. KEsTER, of Terre Il'aute, in the county of Vigo and State of Indiana, have invented certain new an d useful Improvements in Double-Acting Governors for-Dynamos or Motors; and I do hereby declare that the followingis a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form part of this specification.

My invention relates to improvements in regulators for dynamo machines or motors.

The object of the invention to provide an improved automatic governor exceedingly simple and cheap of construction, composed of a minimum number of strong and durable parts, and very quick and reliable in action and capable of being readily adjusted at any time to change the limit of speed, and, further, to mount the governor upon an extension of the armature-shaft and connect the same to control an improved regulating system.

\V'ith these ends in view my invention consists in certain novel features of construction and combinations of parts, more fully described hereinafter, and particularly pointed out in the claims.

Referring to the accompanying drawings, Figure 1 is a partial sectional view of an armature-shaft, showing an armature-core partiallybroken away, also showing in diagram a commutator detached from the shaft, to be more clearly seen, and armature-coils. Fig. 2 is a detail perspective view detached of the movable contact and theT-bar or cross-head operating the same. Fig. 3 is a detail sectional view of the governonweight. Fig. 4: is a detail perspective view of the hollow support or tube upon which the governor-weight slides and is supported. Fig. 5 is a detail sectional view of the regulating nut and spring controlling the centrifugal movement of the governor-weight. Fig. (5 is a diagrammatical view of the regulating-circuit, including one armature-coil of a different style of armature from that shown in Fig. 1.

In the drawings, the reference-letter a in Serial No. 289,410. (No model.)

dicates a hollow extension of insulating material, preferably screwed or otherwise se cured to one end of the armature-shaft l), which it is preferred shall be hollow at that end, as shown. A hollow support or guide 0 extends radiallyfrom the insulated extension of the armature-shaft, and is suitably secured to the same, as by a screw or other means. A governor-weight (I is arranged to slide upon the support 0, and is provided with a recess around the support, forming an annular flange at the inner end of the weight, as shown. A spring 6 embraces the support 0 and bears against said annular flange of the governor-weight at its inner end, and at its opposite end the spring bears against an adjusting-screw f upon the outer end of the support or guide 0, which is screw-threaded, as shown.

A movable bent contact-lever g is pivoted at its elbow in the hollow extension (1, to allow its upper end, carrying contact-point a limited back-and-forth horizontal movement, and the opposite or horizontal arm of the lever is loosely confined in an aperture in the inner end of the leg of T-bar 71, said leg being longitudinally located in the hollow guide and projecting into the hollow extension a. The cross-arms of the T extend through and slide in slots 'i in the hollow guide and project into the recess in the weight on the outer side of the internal flange. Thus it will be seen that when the armature-shaft rotates and the weight presses outward against the tension of spring 6 the T-bar will be drawn out, and the contact-point at the free end of the contact-lever will be drawn into contact with a stationary contactj in the hollow extension.

7o indicates the core of an armature mount ed upon the shaft 1). The armature-coilsl and commutator Z are not shown in their usual positions, but are shown at one side connected in diagram to clearly show the connections.

In the construction of armature shown four coils only of an armature are shown, the opposing eoils being connected together and to commutatonstrips, and the opposing commutator-strips being connected, so that all the coils of the set are in circuit at once.

In Fig. 6 a different style of armature is shown, in which but one coil is included in the regulating-circuit.

By my regulating-circuit the terminal commutator-strips of two of the opposing coils are connected, respectively, with contact-le ver 9 and with stationary contact j by connections 1 2.

To reduce sparking between the contacts, and also the abrupt effect on the armature when the governor-connection is made and broken, a resistance-coil m is placed in the connection between one of the commutatorstrips and one of the circuit-controlling' contact-points, as clearly shown. The resistance-coil is preferably placed inside the armature and fits snugly around the armatureshaft.

It will be seen that when the armatureshaft reaches a certain speed of revolution the governor-weight will tend to fly outward and close the circuit at the contactpoints, and thereby short-circuit the armature-coils connected with the same. In the present instance all four of the coils will be short-circuited, as they are connected, as described, to produce a current in one direction; but I wish it understood that I do not limit myself to any peculiar construction of armature or connection of armature-coils, as the peculiar connection and arrangement of armature-coils and commutator-strips herein shown are merely intended to illustrate the operation of my invention, and that one or more coils can be included in the short circuit instead of four, as most desirable and expedient in the style of machine being used.

It will also be evident that by adjusting the thumb-screw to or from the hollow extension the spring will be put upon more or less tension, and therefore a higher or lower speed will be required to bring the contacts g and j into contact.

It is evident that various slight changes or modifications might be resorted to in the form and arrangement of the parts described without departing from the spirit and scope of my invention; hence I do not wish to limit myself strictly to the precise construction herein set forth.

. What I claim is 1. A regulator for a dynamo or motor, comprising a regulating-circuit, a speed-governor mounted upon a rotating part of the machine, and a circuit-controller included in the circuit and comprising a stationary contactpoint and a bell-crank lever pivoted to the rotatingp-art of the machine, one arm of which is connected with the governor and the other arm forms the shifting contact movable to or from the stationary point, substantially as described.

2. A dynamo or motor regulator comprising a speed-governor rotating with the armatureshaft, a normally-open short circuit, and a circuit-controller included within the same and comprising a stationary contact-point and a lever pivoted tothe armature-shaft and connected with and operated by the governor, and provided with a movable contact to engage the stationary point and close the short cuit-controller located in the hollow extension and comprising a stationary contact and a pivoted lever connected with the governor, and provided with a contact movable to or from the stationary contact in a plane parallel with the axis of the shaft.

5. A centrifugal governor for dynamo-elec tric machinery, comprising a hollow slotted guide externally screw threaded upon its outer end, a sliding weight embracing the guide, an adjustable nut upon the screwthreaded portion of the guide,a coiled spring embracing the guide between the weight and nut, and a rod within the guide and connected to move with the weight, substantially as described.

6. In a dynamo or motor, a hollow extension of the armature-shaft and a bent lever pivoted in the same, in combination with a guide screwed into and extending radially from the hollow extension, a sliding weight embracing the guide, a spring to yieldingly hold the guide against centrifugal force, and a rod connecting the weight and one arm of said lever, substantially as described.

7. A dynamo or motor regulator comprising a normally-open short circuit, including one or more armature-coils, and a circuit-controller and speed-governor to close the circuit when a predetermined speed is reached.

' 8. A dynamo or motor regulator comprising a normally-open regulating or short circuit, including one or more armature-coils, a resistance within the same, a circuit-controller within the circuit, and a speed-governor carried by a rotating part of the machine and connected with the controller to close the circuit when a predetermined speed is reached, for the purpose set forth.

9. In a dynamo or motor, the combination of a circuit, a hollow guide extending radially from a rotating part of the machine, a governor-weight sliding on the same, a spring and adjustable nut to regulate the tension of the spring on the weight, a T-bar located in said guide and engaging the weight and operated by the same, and a circuitrcontroller comprising a stationary contact, and a contact-lever pivoted at its elbow and having a horizontally-movable contact, and an arm connected with the inner end of said T- bar, substantially as described.

10. In a dynamo or motor, the combination of an armature-shaft, a regulating-circuit, a non-conducting hollow extension secured to said shaft, a centrifugal governor mounted upon and rotating with the same, and a circuit-controller located within said extension and comprising a stationary contact and a contact operated by the governor and movable to or from the stationary contact in a plane parallel with the axis of the shaft, sub stantially as described.

11. In a dynamo or motor, the combination, with an armature, of a normally-open short circuit including one or more armature-coils, a speed-governor, a circuit-controller, and a resistance-coil included in said circuit, for the purpose set forth.

12. In a dynamo or motor, the combination of an armature, a commutator for the same,

JESSE F. KESTER. Witnesses:

IIUBERT E. PEcK, CHAS. M. WERLE. 

